(Table 2) Age determination of sediments from the Nordic Seas

DOI

A combined record of three cores spanning the last 18 kyr from the northern North Sea is investigated for content of benthic and planktonic foraminifera and stable oxygen isotopes. The paleoenvironmental development through this time period shows an early deglaciation (18-14.4 ka) and the Younger Dryas (12.7-11.5 ka) characterized by arctic/polar conditions and increased ice rafting in the Norwegian Channel. During the Bølling-Allerød period, warm sea surface temperature (9°C) conditions similar to present conditions are inferred, while bottom waters stayed cold (0-1°C) with normal salinity. The Bølling-Allerød period is interrupted twice at 13.9-13.6 ka (Older Dryas) and at 13.0-12.8 ka (Inter-Allerød Cooling Period) by reductions in sea surface temperatures and increased sea ice cover. The beginning of the Holocene period is marked by increases in surface and bottom water temperature. Superimposed on the broad climatic changes through the Holocene, a series of short-lived oscillations in the ocean circulation are recorded. The amplitude of these Holocene events appears larger in the early Holocene (prior to 8 ka) than compared with the remaining part of the Holocene. This amplification can possibly be attributed to a general increased freshwater budget in the North Atlantic at this time during the final stages of the deglaciation of the Laurentide and Scandinavian ice sheets.

For reservoir correction and calibration of AMS dates older than 10 14C ka, see Haflidason et al. (1995) for more details; for AMS dates younger than 10 14C ka, see Stuiver and Braziunas (1993). Dating of ash layers is from Birks et al. (1996).

Supplement to: Klitgaard-Kristensen, Dorthe; Sejrup, Hans Petter; Haflidason, Haflidi (2001): The last 18 kyr fluctuations in Norwegian sea surface conditions and implications for the magnitude of climatic change: Evidence from the North Sea. Paleoceanography, 16(5), 455-467

Identifier
DOI https://doi.org/10.1594/PANGAEA.846598
Related Identifier https://doi.org/10.1029/1999PA000495
Related Identifier https://doi.org/10.1006/qres.1996.0014
Related Identifier https://doi.org/10.1130/0091-7613(1995)023<1059:CROTLG>2.3.CO
Related Identifier https://doi.org/10.1017/S0033822200013874
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.846598
Provenance
Creator Klitgaard-Kristensen, Dorthe; Sejrup, Hans Petter; Haflidason, Haflidi
Publisher PANGAEA
Publication Year 2001
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Representation
Language English
Resource Type Supplementary Dataset; Dataset
Format text/tab-separated-values
Size 145 data points
Discipline Earth System Research
Spatial Coverage (3.717W, 60.630S, 3.733E, 60.867N); North Sea